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Motors Technical Information

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Basics of...Motors

It is important to select the motor that will help assure optimum performance of the equipment to be driven. To do this, a motor must be selected that is capable of starting the equipment, bringing it up to operating speed, and driving it at the necessary loading speed as long as required without excessive heating. The following motor specifications should be considered.

Category/Application

Review the chart below to determine what category of motor is needed.

Category Common Applications Common Motor Types

General Purpose
  • Belt Drive Fans
  • Belt Drive Blowers
  • Pumps
  • Conveyors
  • Machine Tools
  • Compressors
  • Material Handling
  • Split Phase
  • Capacitor Start
  • Three Phase

Definite /
Special Purpose
  • Washdown
  • Hazardous Location
  • Farm Duty
  • Close Coupled Pump
  • Fire Pump
  • Pool & Spa Pump
  • Elevator Duty
  • Gate & Door
  • Commercial Jet Pump
  • Permanent Split Capacitor (PSC)
  • Split Phase
  • Capacitor Start
  • Three Phase

HVAC
  • Condenser Fan
  • Direct Drive Blower & Fan
  • Belt Drive Blower & Fan
  • Unit Heater
  • RoomAC/FanCoil
  • Evaporative Cooler
  • Hot Water Circulator
  • Oil Burner
  • Unit Bearing
  • Cooling Tower
  • Refrigeration·
  • Air-Circulating
  • PSC
  • Shaded Pole
  • Split Phase
  • Capacitor Start
  • Three Phase

Tip: Some motors can be used for multiple applications

Cap Start General Purpose

Horsepower (HP)

Measurement of how much work is done in a specific amount of time. This value indicates the power output of the motor and usually is specified as a fraction or in a whole number. Small motors can be rated in watts.

Tip: Select a motor with equal or greater horsepower to the existing motor. Tip: If no HP or Watt rating is available, amp draw (typically available on the nameplate) provides the next best characteristic to sizing the motor.

RPM

Revolutions per minute (RPM) indicate how fast the motor shaft will rotate under the specified load (HP). Multi-speed motors can be rated either with the RPM and the number of speeds (1075/3-speed) or with the RPM for each speed .

Poles and RPM are used interchangeably. Reference the chart below.

Poles Synchronous RPM Typical Nameplate RPM
2 3600 3000-3450
4 1800 1625-1750
6 1200 1050-1140
8 900 825-850

Tip: Match RPM within 5% of nameplate RPM.

Tip: Remember that the horsepower (HP) rating of the motor only applies to the high speed of a multi-speed motor. As the speed is reduced, the horsepower is reduced.

Nema Premium Logo

NEMA (National Electrical Manufacturers Association) along with electric motor member companies established a NEMA Premium® energy efficiency motors program to provide highly energy efficient products that meet the needs and applications of users based on a consensus definition of ′′premium efficiency′′ and use of the NEMA Premium® logo for premium products.

Choosing a motor with the NEMA Premium® logo will identify higher efficient motors that will save money in total energy operating cost and improve system reliability.

For more information about the NEMA Premium® efficiency motor program, go to www.nema.org/premiummotors.com.

Voltage

Voltage is the power rating at which the motor is designed to operate. A motor should operate at plus or minus 10% of nameplate voltage. A 230 volt motor should operate over a range of 207 volts to 253 volts. A slash (/) between listed voltages indicates there is a different connection for these voltages. A hyphen (-) between voltages listed usually indicates the same connection is used for these voltages. (No plus or minus 10%.)

Tip: Match to supplied voltage.

Tip: If the supplied voltage is 115, and the replacement motor is 115/230, the motor will work, if connected for 115 volts.

Frequency/Hertz (Hz)

The term hertz or frequency was formally called “cycles�? and is nearly always 60 hertz in the USA and Canadian applications. Some foreign countries, especially Europe use 50 hertz power supplies.

Tip: Match Hz exactly or with a 50/60 capable motor.

Type/Phase

Select the motor type based on typical characteristics and uses.

Motor Type Hp Range Typical Nameplate Rpm Typical Characteristics Typical Uses

Shaded Pole, Single Phase

Up to 1/2 HP

Multi-Speed, 1050, 1550, 3000
  • Low efficiency
  • Not for belt drive as a rule
  • Air over design usually required
  • Always single voltage
  • Non-reversible
  • Low starting torque

Small Fans and Blowers, Unit Heaters, Space Heaters, Humidifiers, Freezer Blowers, Window Fans, Floor Fans, Portable Evaporative Coolers

Permanent Split Capacitor (PSC), Single Phase

Up to 1 HP

Multi-Speed, 825, 1075, 1625, 3250
  • Improved efficiency vs. shaded pole
  • Not for belt drive, as a rule
  • Air over design usually required
  • Typically single voltage
  • Low starting torque

Small Mounted Fans, Air Circulators, Blowers, Room AC and Central AC, Condenser Fans, Evaporator Fans, Furnace Blowers, Unit Heaters, Window Fans, Oil Burners, Pool Pump, Door Operators, Animal Confinement Fans for: Poultry, Hogs, Cattle

Split Phase, Single Phase

Up to 1 HP

850, 1140, 1725, 3450
  • Moderate efficiency
  • Typically used in belt drive applications
  • No capacitor needed for start-up
  • Available in single voltage and dual voltage
  • Generally reversible rotation
  • Medium starting torque

Belted Fans, Blowers, AC Fans, Blowers, Office Machines, Small Centrifugal Pumps, Home Appliances, Door Operators, Oil Burners, Poultry Feeders, Attic Fans, Furnace Blowers, Small Tools, Lathes

Capacitor Start, Single Phase

1/6 to 10 HP

850, 1140, 1725, 3450
  • Improved efficiency vs. split phase
  • Typically used in belt drive applications
  • Capacitor Required
  • Available in single voltage and dual voltage
  • Generally reversible rotation
  • High starting torque

Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders

Three Phase

1/4 HP and Up

850, 1140, 1725, 3450
  • High to Premium efficiency
  • Used in belt drive and direct drive applications
  • Three phase power required
  • Typically dual voltage
  • Generally reversible rotation
  • High starting torque

Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders, Drying Fans, Gear Motors
Tip: In many cases a PSC motor can replace a shaded pole motor, and a capacitor start motor can replace a split phase motor assuming the other key characteristics are met.

Environment

Select the motor type based on the operating environment.

Environment Type Typical Description

Clean, Dry, Indoor, Non-Hazardous

OAO Open Air Over

Vent openings in shell and/or end shields must be located in air stream to provide motor cooling.

 

ODP Open Drip Proof

Vent openings that are placed so drops of liquid falling within an angle of 15 degrees from vertical will not affect performance.

Dirty, Damp, Outdoor, Non-Hazardous

TEFC Totally Enclosed Fan Cooled

No vent openings in shell or end shield. Includes an external fan that blows cooling air over the motor frame.

 

TENV Totally Enclosed Non Vented

No vent openings in shell or end shield. Depends on convection air for cooling.

 

TEAO Totally Enclosed Air Over

No vent openings in shell or end shield. Depends on airflow from driven device for motor cooling. Must be loaded in air stream.

Hazardous Explosion-Proof

TEFC/TENV

No vent openings in shell or end shields. Designed to withstand an internal explosion of specified gases or vapors and not allow the internal flame or explosion to escape.

Tip: A totally enclosed motor can replace an open motor assuming other characteristics meet the application requirements.

Select Mounting

Mounting is the way a motor mounts to the application. This is usually determined by the application itself, how the motor is to be used, and where it will be mounted. Below are some of the typical mounting configurations:

RESILIENT or CRADLE BASE

Motor is isolated from base by rubber rings on the end shield

Resilient or Cradle Base

RIGID or FOOTED BASE

Motor base is welded or bolted directly to motor shell

Resilient or Cradle Base

YOKE MOUNT

Tabs are welded to bottom of motor shell for bolting to a fan column or bracket

yoke mount

C-FACE WITHOUT BASE

End shield has holes for mounting

face without base

C-FACE WITH BASE

End shield has holes for mounting, with base

c face with base

RING

Rubber rings on each end shield. No base

ring

STUD

Extended thru-bolts (studs) for mounting

stud

Tip: Many times the frame designation helps identify the way the motor is mounted (56C = C-Face)

Thermal Overload/Protector

A temperature-sensing device built into the motor that shuts off the motor if the temperature becomes excessive due to failure-to-start or overloading.

Automatic Reset Thermal Overload Protector (auto) - after motor cools, thermal protector automatically restores power.

Should not be used where unexpected restarting would be hazardous.

Manual Reset Thermal Overload Protector (man) - An external button must be pushed to restore power to motor.

Preferred where unexpected restarting would be hazardous, as on saws, conveyors, compressors, etc.

If the motor does not have thermal protection, then the nameplate will be blank or will show non protected “none�?.

Tip: It is important to match the thermal protection to the motor that is being replaced.

Bearing Type

Bearings support the rotating parts of the motor. They are usually either ball or sleeve.

Tip: Sleeve: Used on fractional HP motors with low to moderate loads. Ball: Used where a higher load capacity is required.

Service Factor

A measure of the reserve margin built into a motor. Motors rated over 1.0 SF have more than normal margin, and are used where unusual conditions such as occasional high or low voltage, momentary overloads, etc., are likely to occur.

Tip: Always match the service factor with the same or higher.

Coatings

The insulation class refers to the class of insulation and related components used in the motor. These are rated by standard NEMA classifications according to the motor’s maximum operating temperatures.

Tip: Keep in mind, each 10° C rise above the ratings can reduce the life of the motor by half.
Tip: Under normal conditions a replacement motor should have a class equal to or higher than the original. If the replacement is a lower rating, it could cause premature failure.

CLASS TOTAL TEMPERATURE OF SYSTEM
A 105°C (221°F)
B 130°C (266°F)
F 155°C (311°F)
H 180°C (356°F)

(Maximum Allowable Operating Temperature)

Frame

Frame size is defined by NEMA (National Electrical Manufacturers Association). See NEMA Chart below.

NEMA Frame Suffix Code Chart

  • C = Face Mount
  • H = Has 2F dimension larger than same frame without H suffix
  • J = Face mount to fit jet pump
  • JM, JP = Face mount to fit close-coupled pumps
  • K = Has hub for sump pump mounting
  • M = Flange mount for oil burner (5 1�?�2′′rabbet diameter)
  • N = Flange mount for oil burner (6 3�?�8′′ rabbet diameter)
  • T, TS = Integral HP motor dimension NEMA standards set in 1964
  • U = Integral HP motor dimension NEMA standards set in 1953
  • Y = Non-standard mounting, see manufacturers drawing
  • Z = Non-standard shaft extension
  • Example: 56C - 56(NEMA Frame Designation), C(NEMA Frame Suffix Code)

Tips:

  • If unsure of the frame size, measuring the shaft height is your best indicator to determine the frame size of the motor
  • Letters in front of the frame size number typically are ignored (manufacturer specific code)
  • Letters after the frame size number are important in selecting the correct replacement motor
  • Motors with frame designation that include Y and Z after the frame size, in most cases can be replaced with a standard motor (Measure shaft and note mounting method to compare with replacement motor)
  • A 56HZ motor can be replaced by a 143T or 145T frame motor
keyseat

 

JM Shaft

 

 

 

 

 

 

 

Keyseat

Frame

AH

U

EM

EL

EN

AK

R

S

143

41�?�4

7�?�8

1

15�?�32

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

145

41�?�4

7�?�8

1

15�?�32

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

182

41�?�4

7�?�8

1

11�?�4

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

184

41�?�4

7�?�8

1

11�?�4

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

213

41�?�4

7�?�8

1

11�?�4

3�?�8-16 x.75

81�?�2

49�?�64

3�?�16

215

41�?�4

7�?�8

1

11�?�4

3�?�8-16 x.75

81�?�2

49�?�64

3�?�16

254

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

81�?�2

17�?�64

1�?�4

256

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

81�?�2

17�?�64

1�?�4

284

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

286

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

324

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

326

51�?�4

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4
JP Shaft

 

 

 

 

 

 

 

Keyseat

Frame

AH

U

EM

EL

EN

AK

R

S

143

75�?�16

7�?�8

1

15�?�32

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

145

75�?�16

7�?�8

1

15�?�32

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

182

75�?�16

7�?�8

1

11�?�4

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

184

75�?�16

11�?�4

1

11�?�4

3�?�8-16 x.75

41�?�2

49�?�64

3�?�16

213

81�?�8

11�?�4

13�?�8

13�?�4

3�?�8-16 x.75

81�?�2

17�?�64

1�?�4

215

81�?�8

11�?�4

13�?�8

13�?�4

3�?�8-16 x.75

81�?�2

17�?�64

1�?�4

254

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

81�?�2

17�?�64

1�?�4

256

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

81�?�2

17�?�64

1�?�4

284

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

286

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

324

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

326

81�?�8

11�?�4

13�?�8

13�?�4

1�?�2-13 x 1.00

121�?�2

17�?�64

1�?�4

364

81�?�8

15�?�8

13�?�4

21�?�8

1�?�2-13 x 1.00

121�?�2

113�?�32

3�?�8

365

81�?�8

15�?�8

13�?�4

21�?�8

1�?�2-13 x 1.00

121�?�2

113�?�32

3�?�8
keyseat

 

Type C-Face AC Motors, Footed or Footless

 

 

 

 

 

 

 

BF Hole

 

 

Keyseat

Frame
Designation

AJ

AK

BA

BB Min.

BC

BD Max.

Number

Tap Size

Bolt Penetration
Allowance

U

AH

R

S

42C

33�?�4

3

21�?�16

1�?�8

-0.19

5

4

1�?�4-20

-

3�?�8

15�?�16

21�?�64

flat

48C

33�?�4

3

21�?�2

1�?�8

-0.19

55�?�8

4

1�?�4-20

-

1�?�2

111�?�16

29�?�64

flat

56C

57�?�8

41�?�2

23�?�4

1�?�8

-0.19

61�?�2

4

3�?�8-16

-

5�?�8

21�?�16

33�?�64

3�?�16

143TC & 145TC

57�?�8

41�?�2

23�?�4

1�?�8

0.12

61�?�2

4

3�?�8-16

9�?�16

7�?�8

21�?�8

49�?�64

3�?�16

182TC & 184TC

71�?�4

81�?�2

31�?�2

1�?�4

+0.12

9

4

1�?�2-13

3�?�4

11�?�8

25�?�8

63�?�64

1�?�4

182TCH & 184TCH

57�?�8

81�?�2

31�?�2

1�?�8

+0.12

61�?�2

4

3�?�8-16

9�?�16

11�?�8

25�?�8

63�?�64

1�?�4

213TC & 215TC

71�?�4

41�?�2

41�?�4

1�?�4

+0.12

9

4

1�?�2-13

3�?�4

13�?�8

31�?�8

113�?�64

5�?�16

254TC & 256TC

71�?�4

81�?�2

43�?�4

1�?�4

+0.25

10

4

1�?�2-13

3�?�4

15�?�8

33�?�4

113�?�32

3�?�8

284TC & 286TC

9

81�?�2

43�?�4

1�?�4

+0.25

111�?�4

4

1�?�2-13

3�?�4

17�?�8

43�?�8

119�?�32

1�?�2

284TSC & 286TSC

9

101�?�2

43�?�4

1�?�4

+0.25

111�?�4

4

1�?�2-13

3�?�4

15�?�8

3

113�?�32

3�?�8

324TC & 326TC

11

101�?�2

51�?�4

1�?�4

+0.25

14

4

5�?�8-11

15�?�16

21�?�8

5

127�?�32

1�?�2

324TSC & 326TSC

11

121�?�2

51�?�4

1�?�4

+0.25

14

4

5�?�8-11

15�?�16

17�?�8

31�?�2

119�?�32

1�?�2

364TC & 365TC

11

121�?�2

57�?�8

1�?�4

+0.25

14

4

5�?�8-11

15�?�16

23�?�8

55�?�8

21�?�64

5�?�8

364TSC & 365TSC

11

121�?�2

57�?�8

1�?�4

+0.25

14

8

5�?�8-11

15�?�16

17�?�8

31�?�2

119�?�32

1�?�2

404TC & 405TC

11

121�?�2

65�?�8

1�?�4

+0.25

151�?�2

8

5�?�8-11

15�?�16

27�?�8

7

229�?�64

3�?�4

404TSC & 405TSC

11

121�?�2

65�?�8

1�?�4

+0.25

151�?�2

8

5�?�8-11

15�?�16

21�?�8

4

127�?�32

1�?�2

444TC & 445TC

14

16

71�?�2

1�?�4

+0.25

18

8

5�?�8-11

15�?�16

33�?�8

81�?�4

27�?�8

7�?�8

444TSC & 445TSC

14

16

71�?�2

1�?�4

+0.25

18

8

5�?�8-11

15�?�16

23�?�8

41�?�2

21�?�64

5�?�8

447TC & 449TC

14

16

71�?�2

1�?�4

+0.25

18

8

5�?�8-11

15�?�16

33�?�8

81�?�4

27�?�8

7�?�8

447TSC & 449TSC

14

16

71�?�2

1�?�4

+0.25

18

8

5�?�8-11

15�?�16

23�?�8

41�?�2

21�?�64

5�?�8

5000 Frame Series

141�?�2

161�?�2

-

1�?�4

+0.25

18

4

5�?�8-11

15�?�16

-

-

-

-
Motors Diagram

AC Foot-Mounted Motors with Single Straight Shaft Extension

Frame
Designation		 A
Max.		 D E 2F BA H U N-W V Min. Keyseat
R   S		 AA
Min.
42 - 2 5/8 1 3/4 1 11/16 2 1/16 9/32 slot 3/8 1 1/8 - 2 1/64 flat -
48 - 3 2 1/8 2 3/4 2 1/2 11/32 slot 1/2 1 1/2 - 29/64 flat -
48H - 3 2 1/8 4 3/4 2 1/2 11/32 slot 1/2 1 1/2 - 29/64 flat -
56 - 3 1/2 2 7/16 3 2 3/4 11/32 slot 5/8 1 7/8 - 33/64 3/16 -
56H - 3 1/2 2 7/16 5 2 3/4 11/32 slot 5/8 1 7/8 - 33/64 3/16 -
143T 7 3 1/2 2 3/4 4 2 1/4 11/32 hole 7/8 2 1/4 2 49/64 3/16 3/4
145T 7 3 1/2 2 3/4 5 2 1/4 11/32 hole 7/8 2 1/4 2 49/64 3/16 3/4
182 9 4 1/2 3 3/4 4 1/2 2 3/4 13/32 hole 7/8 2 1/4 2 49/64 3/16 3/4
184 9 4 1/2 3 3/4 5 1/2 2 3/4 13/32 hole 7/8 2 1/4 2 49/64 3/16 3/4
182T 9 4 1/2 3 3/4 4 1/2 2 3/4 13/32 hole 1 1/8 2 3/4 2 1/2 63/64 2 1/2 3/4
184T 9 4 1/2 3 3/4 5 1/2 2 3/4 13/32 hole 1 1/8 2 3/4 2 1/2 63/64 2 1/2 3/4
213 10 1/2 5 1/4 4 1/4 5 1/2 3 1/2 13/32 hole 1 1/8 3 2 3/4 63/64 2 1/2 3/4
215 10 1/2 5 1/4 4 1/4 7 3 1/2 13/32 hole 1 1/8 3 2 3/4 63/64 2 1/2 3/4
213T 10 1/2 5 1/4 4 1/4 5 1/2 3 1/2 13/32 hole 1 3/8 3 3/8 3 1/8 1 13/64 5/16 1
215T 10 1/2 5 1/4 4 1/4 7 3 1/2 13/32 hole 1 3/8 3 3/8 3 1/8 1 13/64 5/16 1
254U 12 1/2 6 1/4 5 8 1/4 4 1/4 17/32 hole 1 3/8 3 3/4 3 1/2 1 13/64 5/16 1
256U 12 1/2 6 1/4 5 10 4 1/4 17/32 hole 1 3/8 3 3/4 3 1/2 1 13/64 5/16 1
254T 12 1/2 6 1/4 5 8 1/4 4 1/4 17/32 hole 1 5/8 4 3 3/4 1 13/32 3/8 1 1/4
256T 12 1/2 6 1/4 5 10 4 1/4 17/32 hole 1 5/8 4 3 3/4 1 13/32 3/8 1 1/4
284U 14 7 5 1/2 9 1/2 4 3/4 17/32 hole 1 5/8 4 7/8 4 5/8 1 13/32 3/8 1 1/4
286U 14 7 5 1/2 11 4 3/4 17/32 hole 1 5/8 4 7/8 4 5/8 1 13/32 3/8 1 1/4
284T 14 7 5 1/2 9 1/2 4 3/4 17/32 hole 1 7/8 4 5/8 4 3/8 1 19/32 1/2 1 1/2
286T 14 7 5 1/2 11 4 3/4 17/32 hole 1 7/8 4 5/8 4 3/8 1 19/32 1/2 1 1/2
284TS 14 7 5 1/2 9 1/2 4 3/4 17/32 hole 1 5/8 3 1/4 3 1 13/32 3/8 1 1/2
286TS 14 7 5 1/2 11 4 3/4 17/32 hole 1 5/8 3 1/4 3 1 13/32 3/8 1 1/2
324U 16 8 6 1/4 10 1/2 5 1/4 21/32 hole 1 7/8 5 5/8 5 3/8 1 19/32 1/2 1 1/2
326U 16 8 6 1/4 12 5 1/4 21/32 hole 1 7/8 5 5/8 5 3/8 1 19/32 1/2 1 1/2
324US 16 8 6 1/4 10 1/2 5 1/4 21/32 hole 1 5/8 3 1/4 3 1 13/32 3/8 1 1/2
326US 16 8 6 1/4 12 5 1/4 21/32 hole 1 5/8 3 1/4 3 1 13/32 3/8 1 1/2
324T 16 8 6 1/4 10 1/2 5 1/4 21/32 hole 2 1/8 5 1/4 5 1 27/32 1/2 2
326T 16 8 6 1/4 12 5 1/4 21/32 hole 2 1/8 5 1/4 5 1 27/32 1/2 2
324TS 16 8 6 1/4 10 1/2 5 1/4 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 2
326TS 16 8 6 1/4 12 5 1/4 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 2
364U 18 9 7 11 1/4 5 7/8 21/32 hole 2 1/8 6 3/8 6 1/8 1 27/32 1/2 2
365U 18 9 7 12 1/4 5 7/8 21/32 hole 2 1/8 6 3/8 6 1/8 1 27/32 1/2 2
364US 18 9 7 11 1/4 5 7/8 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 2
365US 18 9 7 12 1/4 5 7/8 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 2
364T 18 9 7 11 1/4 5 7/8 21/32 hole 2 3/8 5 7/8 5 5/8 2 1/64 5/8 3
365T 18 9 7 12 1/4 5 7/8 21/32 hole 2 3/8 5 7/8 5 5/8 2 1/64 5/8 3
364TS 18 9 7 11 1/4 5 7/8 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 3
365TS 18 9 7 12 1/4 5 7/8 21/32 hole 1 7/8 3 3/4 3 1/2 1 19/32 1/2 3
404U 20 10 8 12 1/4 6 5/8 26/32 hole 2 3/8 7 1/8 6 7/8 2 1/64 5/8 2
Frame
Designation		 A
Max.		 D E 2F BA H U N-W V Min. Keyseat
R   S		 AA
Min.
405U 20 10 8 13 3/4 6 5/8 26/32 hole 2 3/8 7 1/8 6 7/8 2 1/64 5/8 2
404US 20 10 8 12 1/4 6 5/8 26/32 hole 2 1/8 4 1/4 4 1 7/8 1/2 2
405US 20 10 8 13 3/4 6 5/8 26/32 hole 2 1/8 4 1/4 4 1 7/8 1/2 2
404T 20 10 8 13 3/4 6 5/8 26/32 hole 2 7/8 7 1/4 7 2 29/64 3/4 3
405T 20 10 8 12 1/4 6 5/8 26/32 hole 2 7/8 7 1/4 7 2 29/64 3/4 3
404TS 20 10 8 13 3/4 6 5/8 26/32 hole 2 1/8 4 1/4 4 1 27/32 1/2 3
405TS 20 10 8 12 1/4 6 5/8 26/32 hole 2 1/8 4 1/4 4 1 27/32 1/2 3
444U 22 11 9 13 3/4 7 1/2 26/32 hole 2 7/8 8 5/8 8 3/8 2 29/64 3/4 2 1/2
445U 22 11 9 14 1/2 7 1/2 26/32 hole 2 7/8 8 5/8 8 3/8 2 29/64 3/4 2 1/2
444US 22 11 9 16 1/2 7 1/2 26/32 hole 2 1/8 4 1/4 4 1 27/32 1/2 2 1/2
445US 22 11 9 14 1/2 7 1/2 26/32 hole 2 1/8 4 1/4 4 1 27/32 1/2 2 1/2
444T 22 11 9 16 1/2 7 1/2 26/32 hole 3 3/8 8 1/2 8 1/4 2 7/8 7/8 3
445T 22 11 9 14 1/2 7 1/2 26/32 hole 3 3/8 8 1/2 8 1/4 2 7/8 7/8 3
447T 22 11 9 16 1/2 7 1/2 26/32 hole 3 3/8 8 1/2 8 1/4 2 7/8 7/8 3
449T 22 11 9 20 7 1/2 26/32 hole 3 3/8 8 1/2 8 1/4 2 7/8 7/8 3
444TS 22 11 9 25 7 1/2 26/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 3
445TS 22 11 9 14 1/2 7 1/2 26/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 3
447TS 22 11 9 16 1/2 7 1/2 26/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 3
449TS 22 11 9 20 7 1/2 26/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 3
5004 25 12 1/2 10 25 8 1/2 30/32 hole 3 7/8 11 5/8 11 1/4 3 5/16 1 -
5004G 25 12 1/2 10 16 8 1/2 30/32 hole 3 1/2 10 1/2 10 2/8 3 7/8 -
5004S 25 12 1/2 10 16 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5004SS 25 12 1/2 10 16 8 1/2 30/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 -
5006L 28 1/2 12 1/2 10 16 8 1/2 30/32 hole 4 7/8 14 5/8 14 3/8 4 11/64 1 1/4 -
5006S 28 1/2 12 1/2 10 20 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5006MS 28 1/2 12 1/2 10 20 8 1/2 30/32 hole 3 3/8 6 3/4 6 1/2 2 7/8 7/8 -
5008 25 12 1/2 10 20 8 1/2 30/32 hole 3 7/8 11 5/8 11 1/4 3 5/16 1 -
5008G 25 12 1/2 10 25 8 1/2 30/32 hole 3 1/2 10 1/2 10 2/8 3 7/8 -
5008L 28 1/2 12 1/2 10 25 8 1/2 30/32 hole 4 7/8 14 5/8 14 3/8 4 11/64 1 1/4 -
5008S 25 12 1/2 10 25 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5008S 28 1/2 12 1/2 10 25 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5008MS 28 1/2 12 1/2 10 25 8 1/2 30/32 hole 3 3/8 6 3/4 6 1/2 2 56/64 7/8 -
5008SS 25 12 1/2 10 25 8 1/2 30/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 -
5008SS 28 1/2 12 1/2 10 25 8 1/2 30/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 -
5010L 28 1/2 12 1/2 10 32 8 1/2 30/32 hole 4 7/8 14 5/8 14 3/8 4 11/64 1 1/4 -
5010S 28 1/2 12 1/2 10 32 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5010MS 28 1/2 12 1/2 10 32 8 1/2 30/32 hole 3 3/8 6 3/4 6 1/2 2 7/8 7/8 -
5010SS 28 1/2 12 1/2 10 32 8 1/2 30/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 -
5012L 28 1/2 12 1/2 10 40 8 1/2 30/32 hole 4 7/8 14 5/8 14 3/8 4 11/64 1 1/4 -
5012S 28 1/2 12 1/2 10 40 8 1/2 30/32 hole 2 7/8 5 3/4 5 1/2 2 29/64 3/4 -
5012MS 28 1/2 12 1/2 10 40 8 1/2 30/32 hole 3 3/8 6 3/4 6 1/2 2 7/8 7/8 -
5012SS 28 1/2 12 1/2 10 40 8 1/2 30/32 hole 2 3/8 4 3/4 4 1/2 2 1/64 5/8 -
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